From owner-freebsd-questions@FreeBSD.ORG Thu Jan 17 15:45:46 2008 Return-Path: Delivered-To: freebsd-questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id EA41D16A420 for ; Thu, 17 Jan 2008 15:45:46 +0000 (UTC) (envelope-from netslists@gmail.com) Received: from fg-out-1718.google.com (fg-out-1718.google.com [72.14.220.152]) by mx1.freebsd.org (Postfix) with ESMTP id 8C47213C45D for ; Thu, 17 Jan 2008 15:45:46 +0000 (UTC) (envelope-from netslists@gmail.com) Received: by fg-out-1718.google.com with SMTP id 16so802829fgg.35 for ; Thu, 17 Jan 2008 07:45:45 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; bh=Qkte+mghmfQWy8I7+CLIw0Rus6CTNRE1RvcpEEpWHoo=; b=fHUzsH/SLswLBIOoSN5Unvwiz7vvge/d0dD2Lo9yv0cRqsZ+LWRq9QiUG5zzBtatxZNnu9vwdMoFan5crZ96MefEvfC7+yoQCfvGmaUdxzBklLDD0iRFgQACNt1EbIkyCRWhaN3+dASDz5Nwid8hC/JxjhHRnyCFPEgM3EfIcm0= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:content-type:content-transfer-encoding; b=SIGPwNy9CNYbrbZ61wPFzp7inioW+wRm3S39sipr9r5ilTfzMf4fBs8XAN3kaO4elR7fPXTiLGJXh5LbAwS+Mo0vTUE7eCOpSN4pvTrlwJyx8q+PbC2HCtWqRY8IyYDJYHAaOD3SEtGD97KzjdGlupMycAN4kiDG/nIMnAt3/wo= Received: by 10.86.99.9 with SMTP id w9mr2038354fgb.22.1200584745543; Thu, 17 Jan 2008 07:45:45 -0800 (PST) Received: from ?192.168.9.8? ( [91.135.49.10]) by mx.google.com with ESMTPS id 4sm2544915fge.3.2008.01.17.07.45.43 (version=SSLv3 cipher=RC4-MD5); Thu, 17 Jan 2008 07:45:44 -0800 (PST) Message-ID: <478F7825.4030107@gmail.com> Date: Thu, 17 Jan 2008 16:45:41 +0100 From: Sten Daniel Soersdal User-Agent: Thunderbird 2.0.0.9 (Windows/20071031) MIME-Version: 1.0 To: Wojciech Puchar References: <20080113175319.K1468@border.lukas.is-a-geek.org> <20080114074736.L1166@wojtek.tensor.gdynia.pl> <33530618.20080114175618@bk.ru> <20080114170016.N2442@wojtek.tensor.gdynia.pl> In-Reply-To: <20080114170016.N2442@wojtek.tensor.gdynia.pl> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Michael Lednev , Christian Baer , freebsd-questions@freebsd.org Subject: Re: RAID mirror really worked X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 17 Jan 2008 15:45:47 -0000 Wojciech Puchar wrote: >>>> gmirror works too very good without any hardware :) >> >> CB> Yes, but a hardware RAID works without the OS having to know about >> it. :-) >> >> ...and its failures? ;) >> > :) > > for mirroring there is almost no CPU overhead so buying extra hardware > doesn't make sense at all. not mentioning that most of such hardware are > actually normal disk controllers with extra soft in BIOS. these are > supported by ataraid driver. > > > much better is to use gmirror so it will be completely portable. > > and - with gmirror you DO NOT have to mirror/stripe/concat whole drives. > and that's what i do most often - mirror important data but store > unimportant data without it. ... But with a raid controller mirror you do not have to send the data twice over the host bus. gmirror is awesome -- Sten Daniel Soersdal